These Alloy arm sets are compatible with :
Bosch SX Motor#BDU31
Bosch CX Motor#BDU37 (Not BDU38!)
Yamaha PW-X Motor
Giant SyncDrivePro Motor

BUY THIS IF
You want to change length or upgrade your eCrank for the Bosch, Yamaha or Giant motors. MTN or Road use

MOTOR COMPATIBILITY
BOSCH "CX" Motor#BDU37 with ISIS spindle
BOSCH "SX" Motor#BDU31 with ISIS spindle
GIANT SyncDrive Pro -With ISIS spline spindle
YAMAHA PW-X -With ISIS spline spindle

MATERIAL
Left & Right arm set
Forged Alloy

Q-Factor
These are the Qfactors when you install this crank on these motors :
Q = 180mm : on Bosch BDU37 or BDU31 motor
Q = 170mm : on Giant/Yamaha motor

MAIN BOLT
8mm AL main crank bolt for Install/Self-Extract | 50Nm torque

MOTORS - Check your Bosch/Yamaha/Giant motor spindle type. These cranks are made for "ISIS" steel spline spindle motors. They install on Bosch, Yamaha, Giant motors and a few other brand motors with steel ISIS Spindles.
These cranks do NOT install on Bosch "Micro-ISIS" or "Square Taper" spindle motors. NOT FOR BOSCH BDU38 "CX" 2-BOLT MOUNT MOTOR

VIEW MANUAL HERE